/* PROFESSIONAL THEME */
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500&family=Inter:wght@400;500;600&display=swap');

:root {
  /* Kolory */
  --bg-body: #0f0f0f;
  --bg-surface: #1e1e1e;
  --text-main: #e3e3e3;
  --text-muted: #8a8a8a;
  --accent: #00a8ff;
  --accent-hover: #0077cc;
  --shadow: 0 2px 6px rgba(0,0,0,.35);
  --radius: 4px;
  --max-width: 1200px;
  --grid-gap: 1.5rem;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* subtle technical grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, #252525 1px, transparent 1px),
    linear-gradient(to bottom, #252525 1px, transparent 1px);
  background-size: 24px 24px;
  z-index: -1;
  pointer-events: none;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Oswald', sans-serif;
  font-weight: 500;
  margin: 0 0 .5em;
  line-height: 1.2;
}

h1 { font-size: clamp(2rem, 2.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 1.5vw, 1.75rem); }

p { margin: 0 0 1em; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .2s;
}
a:hover { color: var(--accent-hover); }

/* LAYOUT */
.container {
  width: min(90%, var(--max-width));
  margin-inline: auto;
  padding-block: 2rem;
}

/* HEADER */
.site-header {
  background: var(--bg-surface);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-family: 'Oswald', sans-serif;
  font-size: 1.5rem;
  color: var(--accent);
}

/* NAVIGATION */
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
}

.main-nav a {
  color: var(--text-main);
  font-weight: 500;
  padding: .25rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color .2s;
}
.main-nav a:hover { border-color: var(--accent); }

/* MOBILE MENU – checkbox hack */
#menu-toggle { display: none; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: .25rem;
}

.hamburger span {
  width: 26px;
  height: 3px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform .3s;
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    transform: translateY(-120%);
    transition: transform .3s;
    padding: 1rem 0;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 1rem;
    padding: 0 1.5rem;
  }
  #menu-toggle:checked ~ .main-nav { transform: translateY(0); }
}

/* BUTTONS */
.btn {
  display: inline-block;
  padding: .75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
  transition: background .2s;
}
.btn:hover {
  background: var(--accent-hover);
  color: #fff;
}

/* GRIDS */
.offers-grid,
.partners-grid {
  display: grid;
  gap: var(--grid-gap);
}

/* desktop: 3 columns */
@media (min-width: 769px) {
  .offers-grid,
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
}

/* mobile: 1 column */
@media (max-width: 768px) {
  .offers-grid,
  .partners-grid { grid-template-columns: 1fr; }
}

/* CARDS */
.job-card,
.partner-link {
  background: var(--bg-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform .2s;
}
.job-card:hover,
.partner-link:hover { transform: translateY(-4px); }

.job-card h3 { margin-top: 0; }
.job-card .meta {
  color: var(--text-muted);
  font-size: .875rem;
  margin-bottom: .75rem;
}

/* PARTNERS – show-more hack */
.partners-wrapper .partners-hidden { display: none; }
.partners-wrapper .show-more-checkbox:checked ~ .partners-hidden { display: grid; }
.partners-wrapper .show-more-checkbox:checked ~ .show-more-container { display: none; }

.show-more-label {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  margin-top: 1rem;
  display: inline-block;
}

/* ACCORDION (FAQ) */
details {
  background: var(--bg-surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: .75rem;
}
summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
summary::after {
  content: "+";
  font-size: 1.25rem;
  transition: transform .2s;
}
details[open] summary::after { transform: rotate(45deg); }

/* FOOTER */
.site-footer {
  background: var(--bg-surface);
  color: var(--text-muted);
  margin-top: 3rem;
  padding: 2rem 0 1.5rem;
  font-size: .875rem;
}

.footer-content {
  display: grid;
  gap: 2rem;
}

@media (min-width: 769px) {
  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer-section h4 {
  font-family: 'Oswald', sans-serif;
  color: var(--text-main);
  margin-bottom: .5rem;
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section a { color: var(--text-muted); }
.footer-section a:hover { color: var(--accent); }

/* UTILS */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }